Lining for filter elements.



No. 886,420. I 1 PATENTED MAY.5; 190s.

c. SIBLLENSGHEIDT.

LINING FOR FILTER ELEMENTS.

APPLIOATION FILED 0GT.8 1907.

A ttj so TH NORRIS PETERS ca. WASHINGTON. a c.

TED STATES PATENT OFFICE.

CARL SELLENSCHEIDT, OF BERLIN, GERMANY.

LINING FOR FILTER ELEMENTS.

Specification of Letters Patent.

Patented May 5, 1908.

Application filed October 8, 1907. Serial No. 396,360.

provements in Linings for Filter Elements, of i which the following is aspecification.

This invention relates to improvements in filter elements, and consistsin a covering or lining of a hard rubber, vulcanite or similar coveringor lining for the metal frame thereof, combined with soft rubber appliedto said lining at the margin or where a tight joint is required.

The drawing forming a part hereof illustrates a section through one ofthe side members of a filter element constructed in accordance with myinvention.

Referring to the drawing, 0 represents one of the frame members of afilter element of any desired or usual form or kind, the same beingshown in section; I) is a covering or lining completely surrounding theframe member and protecting the liquid from contact with the metal. Thiscovering can be formed of a comparatively cheap grade of rubber, more orless hard, or regular hard rubber or vulcanite, and serves the advantagenot only of protecting the frame from con tact with the liquid butmaterially reinforces and strengthens the frame.

0 represents portions of soft rubber secured by vulcanization or othermeans to those parts of the lining which are intended to form the jointwith other elements and constitute packings for the filter element whichinsure a perfectly tight joint. The covering may be used either forsimple frames with or without grids or network or for stiffening tissueframes or for the supporting parts of grille frames.

I am aware that use has heretofore been made in metal filter frames of astrip of hard rubber as the intermediate connecting piece between themetal and a permanent soft rubber packing, and I do not claim sucharrangement herein.

What I claim and wish to secure is A filter element comprising ametallic frame member, a stiffening lining inclosing the same, formedofmore or less hard rubber or vulcanite, combined with portions of softrubber at the parts intended for forming joints with other elements.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CARL SELLENSCHEIDT.

Witnesses:

HENRY HASPER, HANS HEINMAN.

